%0 Report %A Herbst, Chris M. %T The Introduction of Universal Child Care in New Mexico: Initial Evidence on Mothers' Labor Supply %D 2026 %8 2026 Oct %I Institute of Labor Economics (IZA) %C Bonn %7 IZA Discussion Paper %N 18968 %U https://www.iza.org/publications/dp18968 %X In November 2025, New Mexico became the first U.S. state to implement a universal, no-cost child care subsidy program. This paper estimates difference-in-differences and event-study models to evaluate the impact of universal child care on mothers' short-run labor supply adjustments. Using monthly Current Population Survey data, I find that the reform produced different responses across lower- and higher-skilled mothers. For lower-skilled mothers, the policy increased employment along both the extensive and intensive margins. Conversely, higher-skilled mothers, particularly those who are married, experienced reductions in paid work, with partially offsetting increases in school enrollment. Thus, while universal child care relaxes a binding constraint among disadvantaged families, it acts as an in-kind transfer for their advantaged counterparts. %K child care %K labor supply %K maternal employment